EP2073601A2 - Elektrischer Strahlungsheizer - Google Patents

Elektrischer Strahlungsheizer Download PDF

Info

Publication number: EP2073601A2
Authority: EP; European Patent Office
Prior art keywords: insulating base; face; radiant heater; electric radiant; area
Prior art date: 2007-12-21
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP20080382072

Other languages

English (en)

French (fr)

Other versions

EP2073601B1 (de

EP2073601A3 (de

Inventor

Daniel De los Toyos López

Enaitz López Berriozabalgoitia

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Eika SCL

Original Assignee

Eika SCL

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2007-12-21

Filing date

2008-12-04

Publication date

2009-06-24

2008-12-04 Application filed by Eika SCL filed Critical Eika SCL

2009-06-24 Publication of EP2073601A2 publication Critical patent/EP2073601A2/de

2009-08-26 Publication of EP2073601A3 publication Critical patent/EP2073601A3/de

2015-03-25 Application granted granted Critical

2015-03-25 Publication of EP2073601B1 publication Critical patent/EP2073601B1/de

Status Not-in-force legal-status Critical Current

2028-12-04 Anticipated expiration legal-status Critical

Links

238000010411 cooking Methods 0.000 claims abstract description 6
239000002184 metal Substances 0.000 claims abstract description 5
239000002241 glass-ceramic Substances 0.000 claims abstract description 4
238000010438 heat treatment Methods 0.000 claims abstract description 4
238000000034 method Methods 0.000 claims description 2
239000000463 material Substances 0.000 description 4
239000004965 Silica aerogel Substances 0.000 description 3
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
239000000919 ceramic Substances 0.000 description 3
239000011810 insulating material Substances 0.000 description 3
238000010521 absorption reaction Methods 0.000 description 2
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
239000000428 dust Substances 0.000 description 2
238000009413 insulation Methods 0.000 description 2
239000012229 microporous material Substances 0.000 description 2
238000000465 moulding Methods 0.000 description 2
239000002356 single layer Substances 0.000 description 2
230000006835 compression Effects 0.000 description 1
238000007906 compression Methods 0.000 description 1
229910052878 cordierite Inorganic materials 0.000 description 1
JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
239000010410 layer Substances 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000011159 matrix material Substances 0.000 description 1
239000003605 opacifier Substances 0.000 description 1
230000003252 repetitive effect Effects 0.000 description 1
-1 steatite Inorganic materials 0.000 description 1
239000002470 thermal conductor Substances 0.000 description 1

Images

Classifications

- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
- H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater

Definitions

This invention relates to an electric radiant heater adapted to a cooking hob, in particular a glass-ceramic cooktop.
Electric radiant heaters adapted to a cooking hob are know in the prior art, and which comprise a metal support cover that houses in its interior an insulating base that includes a perimeter rim and upon which is fixed at least one thermal conductor, said support cover including a support projection that projects out in relation to its base, as disclosed in documents ES 1054629U and EP 1139696A .
the insulating base is made of a thermal insulating material obtained by compression, which comprises a micro-porous silica aerogel reinforced with ceramic fibres and, optionally, alumina and an opacifier, with the result that said insulating base has good mechanical and thermal insulation properties, as disclosed in document GB 1580909 A .
the insulating base In general terms, the insulating base, the faces of which are substantially flat, is supported on the support projection of the support cover via the perimeter rim, whereas in the bottom surface, generally convex, of the support cover, there is a non-uniform gap between the insulating base and the bottom of said support cover.
the object of this invention is to provide an electric radiant heater adapted to a cooking hob, in particular a glass-ceramic cooktop, as defined in the claims.
the electric radiant heater of the invention comprises an insulating base that has, on one end, a substantially flat and circular first face upon which at least one heating resistance is fixed, and, on the opposite end, a substantially circular second face, and a metal support cover that houses said insulating base in its interior.
the second face of the insulating base is supported directly on the bottom surface of the support cover via a contact surface, the area of said contact surface being smaller than the area of the circle delimited by the second face of said insulating base.
an electric radiant heater adapted to a cooking hob, not shown in the figures, comprises a substantially revolving insulating base 2 that has, on one end, a substantially flat and circular first face 2a upon which are fixed one or more heating resistances, not shown in the figures, and on the opposite end, a substantially flat and circular second face 2b defined by a diameter D1, and a metal support cover 3 adapted to the external shape of the insulating base 2, which houses said insulating base 2 in its interior.
the support cover 3 has a substantially vertical wall 3b of a height greater than a thickness H2 of the insulating base 2, and a bottom surface 3a upon which the second face 2b of the insulating base 2 is supported directly via a contact surface 10, the area of said contact surface 10 being smaller than the area of the circle of diameter D1 delimited by the second face 2b.
the insulating base 2 is formed by moulding a single layer of uniform micro-porous material, a good heat-insulating material with good mechanical properties and resistant to the absorption of moisture, which comprises a silica aerogel dust mixed with ceramic-reinforcing fibres, and, optionally, opacifying materials and ceramic loads.
the insulating base 2 includes a plurality of holes 6, symmetrically disposed on the second face 2b, which reduce the area of the contact surface 10 of said second face 2b with the bottom surface 3a, and create layers of insulating air between the insulating base 2 and the support cover 3.
the holes 6 are blind holes defined by a height H1, which is smaller than the thickness H2 of the insulating base 2.
the insulating base 2 comprises a first substantially cylindrical element 4, one of the two faces of which corresponds to the first face 2a of the insulating base 2, and a second substantially cylindrical element 5, one of the two faces of which corresponds to the second face 2b of the insulating base 2, said first element 4 and second element 5 being coaxial and said first element 4 being supported on the second element 5.
the first element 4 is formed by moulding a single layer of uniform micro-porous material, a good heat-insulating material with good mechanical properties and resistant to the absorption of moisture, which comprises a silica aerogel dust mixed with ceramic-reinforcing fibres and, optionally, opacifying materials and ceramic loads, while the second element 5 is made of a material with good mechanical properties, such as alumina, steatite, cordierite or a similar material.
the second element 5 includes a plurality of corresponding holes 7, symmetrically disposed in a beehive panel arrangement, said holes 7 being through-holes, and which reduce the area of the contact surface 10 of the insulating base 2 with the support cover 3, and create air cavities that improve the insulation between the insulating base 2 and the support cover 3.
the support cover 3 includes projections 8 towards the interior of the support cover 3, made by means of a stamping procedure, and upon which the second face 2b of the insulating base 2 is supported, thereby reducing the contact surface 10 between the insulating base 2 and the support cover 3.
the projections 8 may have varying shapes, being capable of taking the form of a matrix of individual projections, of rectilinear channels or concentric circular channels.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Ceramic Engineering (AREA)
Resistance Heating (AREA)
Electric Stoves And Ranges (AREA)

EP20080382072 2007-12-21 2008-12-04 Elektrischer Strahlungsheizer Not-in-force EP2073601B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
ES200702652U ES1066972Y (es)	2007-12-21	2007-12-21	Foco radiante electrico

Publications (3)

Publication Number	Publication Date
EP2073601A2 true EP2073601A2 (de)	2009-06-24
EP2073601A3 EP2073601A3 (de)	2009-08-26
EP2073601B1 EP2073601B1 (de)	2015-03-25

Family

ID=39168027

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20080382072 Not-in-force EP2073601B1 (de)	2007-12-21	2008-12-04	Elektrischer Strahlungsheizer

Country Status (2)

Country	Link
EP (1)	EP2073601B1 (de)
ES (2)	ES1066972Y (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1580909A (en)	1977-02-10	1980-12-10	Micropore Internatioonal Ltd	Thermal insulation material
DE19919784A1 (de)	1999-04-30	2000-11-02	Diehl Ako Stiftung Gmbh & Co	Aufnahmeschale mit einer Isolierschicht für Strahlungsheizelemente und Verfahren zur Herstellung von Kanälen in der Isolierschicht
EP1139696A2 (de)	2000-03-23	2001-10-04	Ceramaspeed Limited	Elektrischer Wärmestrahler
ES1054629U (es)	2003-04-25	2003-08-16	Eika S Coop	"foco radiante para una placa de cocina con un aro aislante"

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2205132C3 (de) *	1972-02-03	1980-09-04	E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen	Elektrokochgerät
DE3034495A1 (de) *	1980-09-12	1982-03-25	Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen	Vorrichtung zur waermedaemmung einer waermequelle
DE3810586A1 (de) *	1988-03-29	1989-10-12	Ego Elektro Blanc & Fischer	Beheizung fuer elektrische kochgeraete

2007
- 2007-12-21 ES ES200702652U patent/ES1066972Y/es not_active Expired - Lifetime
2008
- 2008-12-04 EP EP20080382072 patent/EP2073601B1/de not_active Not-in-force
- 2008-12-04 ES ES08382072.0T patent/ES2533905T3/es active Active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1580909A (en)	1977-02-10	1980-12-10	Micropore Internatioonal Ltd	Thermal insulation material
DE19919784A1 (de)	1999-04-30	2000-11-02	Diehl Ako Stiftung Gmbh & Co	Aufnahmeschale mit einer Isolierschicht für Strahlungsheizelemente und Verfahren zur Herstellung von Kanälen in der Isolierschicht
EP1139696A2 (de)	2000-03-23	2001-10-04	Ceramaspeed Limited	Elektrischer Wärmestrahler
ES1054629U (es)	2003-04-25	2003-08-16	Eika S Coop	"foco radiante para una placa de cocina con un aro aislante"

Also Published As

Publication number	Publication date
ES1066972Y (es)	2008-07-01
EP2073601B1 (de)	2015-03-25
EP2073601A3 (de)	2009-08-26
ES1066972U (es)	2008-04-01
ES2533905T3 (es)	2015-04-15

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2010-02-03	17P	Request for examination filed	Effective date: 20091218
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2010-05-05	AKX	Designation fees paid	Designated state(s): DE ES FR IT
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